What was considered the biggest weakness of British rule in the basic idea of the Non-Cooperation Movement?

Correct answer: Its dependence on Indian cooperation

The governing principle of Non-Cooperation was that colonial authority did not function through force alone; it also relied on the cooperation of Indian subjects, officials, consumers, students, and professionals. If that cooperation were withdrawn peacefully, the system could be weakened. Hence option A is correct. The other choices either reverse the principle or do not explain the movement’s strategy.